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THE INFLUENCE OF AMINO ACIDS ON THE REACTIVATION OF YEAST INVERTASE

THE INFLUENCE OF AMINO ACIDS ON THE REACTIVATION OF YEAST INVERTASE 1. Some 16 amino acids (not containing SH or S-S groups) did not affect the reactivation of yeast invertase inactivated by acid. 2. Cysteine, reduced glutathione, homocysteine, thiophenol, and thioglycollic acid accelerated the reactivation of yeast invertase. 3. Cystine, oxidized glutathione, and homocystine inhibited the reactivation of yeast invertase. 4. The compounds mentioned in 2 and 3 did not affect native invertase. 5. The use of compounds in which the H of the SH group of homocysteine was substituted by a methyl or benzyl nullified the accelerative effect. 6. The longer the cysteine remained in contact with the inactivating enzyme, the greater was the velocity of the reactivated invertase. 7. The per cent acceleration by cysteine is inversely proportional to the control rate. Footnotes Submitted: 15 February 1943 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Journal of General Physiology Rockefeller University Press

THE INFLUENCE OF AMINO ACIDS ON THE REACTIVATION OF YEAST INVERTASE

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Publisher
Rockefeller University Press
Copyright
© 1943 Rockefeller University Press
ISSN
0022-1295
eISSN
1540-7748
DOI
10.1085/jgp.26.5.479
Publisher site
See Article on Publisher Site

Abstract

1. Some 16 amino acids (not containing SH or S-S groups) did not affect the reactivation of yeast invertase inactivated by acid. 2. Cysteine, reduced glutathione, homocysteine, thiophenol, and thioglycollic acid accelerated the reactivation of yeast invertase. 3. Cystine, oxidized glutathione, and homocystine inhibited the reactivation of yeast invertase. 4. The compounds mentioned in 2 and 3 did not affect native invertase. 5. The use of compounds in which the H of the SH group of homocysteine was substituted by a methyl or benzyl nullified the accelerative effect. 6. The longer the cysteine remained in contact with the inactivating enzyme, the greater was the velocity of the reactivated invertase. 7. The per cent acceleration by cysteine is inversely proportional to the control rate. Footnotes Submitted: 15 February 1943

Journal

The Journal of General PhysiologyRockefeller University Press

Published: May 20, 1943

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